Bicycle frame



FIG. 1 is a front view of a bicycle frame showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a right view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right, rear, top perspective view thereof;

FIG. 8 is a right, front, top perspective view thereof;

FIG. 9 is a right, rear, bottom perspective view thereof;

FIG. 10 is a right, front, bottom perspective view thereof;

FIG. 11 is a left, front, top perspective view thereof;

FIG. 12 is a left, front, bottom perspective view thereof;

FIG. 13 is a left, top, rear perspective view thereof; and,

FIG. 14 is a left, bottom, rear perspective view thereof.

The broken lines are included for the purpose of showing portions of the bicycle frame and form no part of the claimed design. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 